Digital magnetic reproducing apparatus and digital magnetic reco

Details Digital magnetic reproducing apparatus and digital magnetic reco Digital magnetic reproducing apparatus and digital magnetic reco

1995-06-07

2000-07-18

Kim, W. Chris

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of biasing or erasing

G11B 503

Patent

active

060915625

ABSTRACT:
A digital magnetic reproducing apparatus comprises a reproducing head to reproduce data from a magnetic recording medium; an equalizer for shaping, by a partial response method, the waveform of the reproduced signal outputted from the reproducing head; and a decoder for decoding, by a maximum likelihood decoding method, the equalized reproduced signal obtained from the equalizer. The reproducing head employed in this apparatus is an MR (magnetoresistance effect) head which is capable of reducing the second harmonic distortion of the reproduced signal to be -25 dB or lower. Therefore the deterioration of the bit error rate that may result from the nonlinear distortion of the MR head can be further lowered within a sufficiently suppressed range in practical use.

REFERENCES:
patent: 4263624 (1981-04-01), Gundry
patent: 4280153 (1981-07-01), Tin
patent: 4706135 (1987-11-01), Kojima
patent: 5124861 (1992-06-01), Shimotashiro et al.
patent: 5182734 (1993-01-01), Watanabe et al.
patent: 5301080 (1994-04-01), Ottesen et al.
patent: 5390054 (1995-02-01), Youngquist et al.
patent: 5424880 (1995-06-01), Nakano et al.

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